crypto: ccree - Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break statements instead of
letting the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <[e-mail]>
Acked-by: Gilad Ben-Yossef <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/ccree/cc_cipher.c

···
 	case S_DIN_to_SM4:
 		if (size == SM4_KEY_SIZE)
 			return 0;
+		break;
 	default:
 		break;
 	}
···
 		case DRV_CIPHER_CBC:
 			if (IS_ALIGNED(size, SM4_BLOCK_SIZE))
 				return 0;
+			break;
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}